Schilke Trumpet Mouthpiece - Silver Plated

Standard Series Trumpet Mouthpiece in Silver Group II 18C3d Silver,Few companies know more about mouthpiece manufacture, design and physics than the Schilke Company,They make a complete line of excellent trumpet mouthpieces that work with any instrument but especially compliment their fine line of outstanding trumpets,Cup Diameter (First number in label): cups range from shallow to deep in numeric order from low to high Cup Volume (First letter in label): volume ranges from A to E from small to large - A: Small B: Medium-Small C: Medium (Standard) D: Medium-Large E: Large Rim Contour (Second number in label): rims range from roundest to slightly rounded in numeric order from low to high - 1: Roundest 2: Simi-Round 3: Standard 4: Semi-Flat 5: Slightly Rounded Backbore (Last letter in label): backbo...,They make a complete line of excellent trumpet mouthpieces that work with any instrument but especially compliment their fine line of outstanding trumpets